/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 17:01:14,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 17:01:14,658 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 17:01:14,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 17:01:14,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 17:01:14,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 17:01:14,662 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 17:01:14,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 17:01:14,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 17:01:14,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 17:01:14,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 17:01:14,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 17:01:14,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 17:01:14,693 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 17:01:14,693 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 17:01:14,693 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 17:01:14,693 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 17:01:14,693 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 17:01:14,694 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 17:01:14,694 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 17:01:14,694 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 17:01:14,697 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 17:01:14,697 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 17:01:14,697 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 17:01:14,700 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 17:01:14,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 17:01:14,700 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 17:01:14,701 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 17:01:14,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 17:01:14,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 17:01:14,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:01:14,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 17:01:14,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 17:01:14,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 17:01:14,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 17:01:14,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 17:01:14,703 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 17:01:14,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 17:01:14,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 17:01:14,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 17:01:14,918 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 17:01:14,918 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 17:01:14,919 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006.opt_bound2.i [2023-08-03 17:01:15,969 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 17:01:16,130 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 17:01:16,130 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006.opt_bound2.i [2023-08-03 17:01:16,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967ba2ddd/23bb86ae4a8c48938ce8b3c0e679cc99/FLAG4ce60acce [2023-08-03 17:01:16,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967ba2ddd/23bb86ae4a8c48938ce8b3c0e679cc99 [2023-08-03 17:01:16,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 17:01:16,150 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 17:01:16,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 17:01:16,150 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 17:01:16,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 17:01:16,153 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d35bf83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16, skipping insertion in model container [2023-08-03 17:01:16,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,179 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 17:01:16,280 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006.opt_bound2.i[944,957] [2023-08-03 17:01:16,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:01:16,418 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 17:01:16,425 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix006.opt_bound2.i[944,957] [2023-08-03 17:01:16,430 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:01:16,431 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 17:01:16,477 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 17:01:16,502 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:01:16,503 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 17:01:16,507 INFO L206 MainTranslator]: Completed translation [2023-08-03 17:01:16,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16 WrapperNode [2023-08-03 17:01:16,508 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 17:01:16,509 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 17:01:16,509 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 17:01:16,509 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 17:01:16,513 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,526 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,547 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 174 [2023-08-03 17:01:16,548 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 17:01:16,548 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 17:01:16,548 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 17:01:16,549 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 17:01:16,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,561 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,561 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,571 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,581 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,582 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,584 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 17:01:16,584 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 17:01:16,584 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 17:01:16,584 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 17:01:16,585 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (1/1) ... [2023-08-03 17:01:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 17:01:16,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:01:16,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 17:01:16,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 17:01:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 17:01:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 17:01:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 17:01:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 17:01:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 17:01:16,654 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 17:01:16,654 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 17:01:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 17:01:16,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 17:01:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 17:01:16,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 17:01:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 17:01:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 17:01:16,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 17:01:16,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 17:01:16,657 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 17:01:16,792 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 17:01:16,794 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 17:01:17,078 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 17:01:17,196 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 17:01:17,196 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 17:01:17,198 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:01:17 BoogieIcfgContainer [2023-08-03 17:01:17,198 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 17:01:17,199 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 17:01:17,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 17:01:17,201 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 17:01:17,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 05:01:16" (1/3) ... [2023-08-03 17:01:17,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36acc32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:01:17, skipping insertion in model container [2023-08-03 17:01:17,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 05:01:16" (2/3) ... [2023-08-03 17:01:17,202 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36acc32e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 05:01:17, skipping insertion in model container [2023-08-03 17:01:17,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 05:01:17" (3/3) ... [2023-08-03 17:01:17,203 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix006.opt_bound2.i [2023-08-03 17:01:17,207 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 17:01:17,213 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 17:01:17,213 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 17:01:17,213 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 17:01:17,240 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:01:17,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,326 INFO L124 PetriNetUnfolderBase]: 30/456 cut-off events. [2023-08-03 17:01:17,326 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:01:17,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 456 events. 30/456 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2021 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-03 17:01:17,336 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:01:17,347 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,348 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 131 transitions, 277 flow [2023-08-03 17:01:17,387 INFO L124 PetriNetUnfolderBase]: 30/456 cut-off events. [2023-08-03 17:01:17,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:01:17,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 456 events. 30/456 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2021 event pairs, 0 based on Foata normal form. 0/400 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-03 17:01:17,391 INFO L119 LiptonReduction]: Number of co-enabled transitions 2604 [2023-08-03 17:01:20,126 INFO L134 LiptonReduction]: Checked pairs total: 6338 [2023-08-03 17:01:20,126 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-03 17:01:20,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:01:20,148 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d2581f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:01:20,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-03 17:01:20,157 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:01:20,157 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 17:01:20,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 17:01:20,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:01:20,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 17:01:20,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:01:20,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:01:20,161 INFO L85 PathProgramCache]: Analyzing trace with hash 186599849, now seen corresponding path program 1 times [2023-08-03 17:01:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:01:20,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526161287] [2023-08-03 17:01:20,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:01:20,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:01:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:01:20,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:01:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:01:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526161287] [2023-08-03 17:01:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526161287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:01:20,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:01:20,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:01:20,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63455745] [2023-08-03 17:01:20,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:01:20,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:01:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:01:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:01:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:01:20,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 245 [2023-08-03 17:01:20,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 81 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:20,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:01:20,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 245 [2023-08-03 17:01:20,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:01:20,674 INFO L124 PetriNetUnfolderBase]: 1412/2311 cut-off events. [2023-08-03 17:01:20,674 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-03 17:01:20,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4556 conditions, 2311 events. 1412/2311 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12492 event pairs, 1155 based on Foata normal form. 0/1963 useless extension candidates. Maximal degree in co-relation 4539. Up to 2181 conditions per place. [2023-08-03 17:01:20,688 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-03 17:01:20,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 143 flow [2023-08-03 17:01:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:01:20,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:01:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-03 17:01:20,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4993197278911565 [2023-08-03 17:01:20,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-03 17:01:20,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-03 17:01:20,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:01:20,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-03 17:01:20,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:20,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:20,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:20,718 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 81 flow. Second operand 3 states and 367 transitions. [2023-08-03 17:01:20,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 143 flow [2023-08-03 17:01:20,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 17:01:20,721 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 87 flow [2023-08-03 17:01:20,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-03 17:01:20,724 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-03 17:01:20,724 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 87 flow [2023-08-03 17:01:20,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:20,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:01:20,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 17:01:20,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 17:01:20,725 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-03 17:01:20,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:01:20,726 INFO L85 PathProgramCache]: Analyzing trace with hash 181251597, now seen corresponding path program 1 times [2023-08-03 17:01:20,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:01:20,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700932305] [2023-08-03 17:01:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:01:20,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:01:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:01:20,741 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 17:01:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 17:01:20,762 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 17:01:20,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 17:01:20,763 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-03 17:01:20,764 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-08-03 17:01:20,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-08-03 17:01:20,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-03 17:01:20,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-08-03 17:01:20,765 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P2Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-08-03 17:01:20,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 17:01:20,765 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 17:01:20,767 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 17:01:20,767 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 17:01:20,786 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 17:01:20,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:20,942 INFO L124 PetriNetUnfolderBase]: 93/1411 cut-off events. [2023-08-03 17:01:20,942 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:01:20,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 1411 events. 93/1411 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9852 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1016. Up to 54 conditions per place. [2023-08-03 17:01:20,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:20,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:20,948 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 17:01:20,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:20,948 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:20,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 156 transitions, 348 flow [2023-08-03 17:01:21,058 INFO L124 PetriNetUnfolderBase]: 93/1411 cut-off events. [2023-08-03 17:01:21,058 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 17:01:21,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 1411 events. 93/1411 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9852 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1016. Up to 54 conditions per place. [2023-08-03 17:01:21,082 INFO L119 LiptonReduction]: Number of co-enabled transitions 6296 [2023-08-03 17:01:23,680 INFO L134 LiptonReduction]: Checked pairs total: 17893 [2023-08-03 17:01:23,680 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 17:01:23,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 17:01:23,682 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5d2581f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 17:01:23,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-03 17:01:23,685 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 17:01:23,685 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-08-03 17:01:23,685 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 17:01:23,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:01:23,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 17:01:23,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:01:23,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:01:23,685 INFO L85 PathProgramCache]: Analyzing trace with hash 446827270, now seen corresponding path program 1 times [2023-08-03 17:01:23,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:01:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138876630] [2023-08-03 17:01:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:01:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:01:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:01:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:01:23,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:01:23,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138876630] [2023-08-03 17:01:23,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138876630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:01:23,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 17:01:23,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 17:01:23,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703292756] [2023-08-03 17:01:23,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:01:23,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:01:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:01:23,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:01:23,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 17:01:23,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 275 [2023-08-03 17:01:23,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:23,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:01:23,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 275 [2023-08-03 17:01:23,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:01:55,640 INFO L124 PetriNetUnfolderBase]: 292934/383658 cut-off events. [2023-08-03 17:01:55,641 INFO L125 PetriNetUnfolderBase]: For 5316/5316 co-relation queries the response was YES. [2023-08-03 17:01:56,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759359 conditions, 383658 events. 292934/383658 cut-off events. For 5316/5316 co-relation queries the response was YES. Maximal size of possible extension queue 10352. Compared 2641137 event pairs, 242016 based on Foata normal form. 0/334557 useless extension candidates. Maximal degree in co-relation 219168. Up to 369312 conditions per place. [2023-08-03 17:01:57,508 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 41 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 17:01:57,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 232 flow [2023-08-03 17:01:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:01:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:01:57,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-03 17:01:57,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5236363636363637 [2023-08-03 17:01:57,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-03 17:01:57,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-03 17:01:57,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:01:57,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-03 17:01:57,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:57,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:57,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:57,513 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 140 flow. Second operand 3 states and 432 transitions. [2023-08-03 17:01:57,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 232 flow [2023-08-03 17:01:57,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 226 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 17:01:57,520 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 144 flow [2023-08-03 17:01:57,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-08-03 17:01:57,521 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-03 17:01:57,521 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 144 flow [2023-08-03 17:01:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:57,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:01:57,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:01:57,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 17:01:57,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:01:57,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:01:57,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2111951198, now seen corresponding path program 1 times [2023-08-03 17:01:57,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:01:57,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865303721] [2023-08-03 17:01:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:01:57,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:01:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:01:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:01:57,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:01:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865303721] [2023-08-03 17:01:57,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865303721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:01:57,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611873936] [2023-08-03 17:01:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:01:57,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:01:57,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:01:57,585 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:01:57,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 17:01:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:01:57,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 17:01:57,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:01:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 17:01:57,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:01:57,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611873936] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:01:57,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:01:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 17:01:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501174314] [2023-08-03 17:01:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:01:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 17:01:57,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:01:57,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 17:01:57,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:01:57,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 275 [2023-08-03 17:01:57,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:01:57,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:01:57,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 275 [2023-08-03 17:01:57,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:02:27,547 INFO L124 PetriNetUnfolderBase]: 283694/371123 cut-off events. [2023-08-03 17:02:27,547 INFO L125 PetriNetUnfolderBase]: For 4347/4347 co-relation queries the response was YES. [2023-08-03 17:02:28,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 733867 conditions, 371123 events. 283694/371123 cut-off events. For 4347/4347 co-relation queries the response was YES. Maximal size of possible extension queue 10300. Compared 2562600 event pairs, 229106 based on Foata normal form. 0/327671 useless extension candidates. Maximal degree in co-relation 733830. Up to 356321 conditions per place. [2023-08-03 17:02:29,400 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 47 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-03 17:02:29,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 260 flow [2023-08-03 17:02:29,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 17:02:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 17:02:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-03 17:02:29,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284848484848484 [2023-08-03 17:02:29,402 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-03 17:02:29,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-03 17:02:29,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:02:29,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-03 17:02:29,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:02:29,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:02:29,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:02:29,405 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 144 flow. Second operand 3 states and 436 transitions. [2023-08-03 17:02:29,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 260 flow [2023-08-03 17:02:29,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 17:02:29,407 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 154 flow [2023-08-03 17:02:29,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2023-08-03 17:02:29,408 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2023-08-03 17:02:29,408 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 154 flow [2023-08-03 17:02:29,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:02:29,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:02:29,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 17:02:29,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 17:02:29,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:02:29,613 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:02:29,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:02:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash 752492814, now seen corresponding path program 1 times [2023-08-03 17:02:29,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:02:29,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745059554] [2023-08-03 17:02:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:02:29,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:02:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:02:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:02:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:02:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745059554] [2023-08-03 17:02:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745059554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:02:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100633638] [2023-08-03 17:02:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:02:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:02:29,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:02:29,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:02:29,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 17:02:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:02:29,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:02:29,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:02:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 17:02:29,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:02:29,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100633638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:02:29,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:02:29,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 17:02:29,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211814503] [2023-08-03 17:02:29,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:02:29,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:02:29,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:02:29,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:02:29,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:02:29,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2023-08-03 17:02:29,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:02:29,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:02:29,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2023-08-03 17:02:29,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:03:00,207 INFO L124 PetriNetUnfolderBase]: 283682/370887 cut-off events. [2023-08-03 17:03:00,208 INFO L125 PetriNetUnfolderBase]: For 4659/4659 co-relation queries the response was YES. [2023-08-03 17:03:01,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734133 conditions, 370887 events. 283682/370887 cut-off events. For 4659/4659 co-relation queries the response was YES. Maximal size of possible extension queue 10366. Compared 2543939 event pairs, 198792 based on Foata normal form. 9/327588 useless extension candidates. Maximal degree in co-relation 212362. Up to 356425 conditions per place. [2023-08-03 17:03:02,262 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 45 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-03 17:03:02,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 60 transitions, 269 flow [2023-08-03 17:03:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 17:03:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 17:03:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 689 transitions. [2023-08-03 17:03:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010909090909091 [2023-08-03 17:03:02,264 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 689 transitions. [2023-08-03 17:03:02,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 689 transitions. [2023-08-03 17:03:02,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:03:02,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 689 transitions. [2023-08-03 17:03:02,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.8) internal successors, (689), 5 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:02,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:02,268 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 275.0) internal successors, (1650), 6 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:02,268 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 154 flow. Second operand 5 states and 689 transitions. [2023-08-03 17:03:02,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 60 transitions, 269 flow [2023-08-03 17:03:02,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 60 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 17:03:02,270 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 170 flow [2023-08-03 17:03:02,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-03 17:03:02,270 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 8 predicate places. [2023-08-03 17:03:02,270 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 170 flow [2023-08-03 17:03:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:02,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:03:02,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:03:02,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 17:03:02,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:02,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:03:02,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:03:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1669565353, now seen corresponding path program 1 times [2023-08-03 17:03:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:03:02,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765224473] [2023-08-03 17:03:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:02,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:03:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:02,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 17:03:02,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:03:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765224473] [2023-08-03 17:03:02,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765224473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:03:02,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775647570] [2023-08-03 17:03:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:02,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:02,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:03:02,509 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:03:02,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 17:03:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:02,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:03:02,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:03:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 17:03:02,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:03:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 17:03:02,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775647570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:03:02,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:03:02,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 17:03:02,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044856414] [2023-08-03 17:03:02,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:03:02,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:03:02,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:03:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:03:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:03:02,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2023-08-03 17:03:02,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:02,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:03:02,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2023-08-03 17:03:02,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:03:25,093 INFO L124 PetriNetUnfolderBase]: 221860/287273 cut-off events. [2023-08-03 17:03:25,093 INFO L125 PetriNetUnfolderBase]: For 3549/3549 co-relation queries the response was YES. [2023-08-03 17:03:25,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568822 conditions, 287273 events. 221860/287273 cut-off events. For 3549/3549 co-relation queries the response was YES. Maximal size of possible extension queue 8387. Compared 1877756 event pairs, 149094 based on Foata normal form. 3/254795 useless extension candidates. Maximal degree in co-relation 201712. Up to 276418 conditions per place. [2023-08-03 17:03:26,769 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 45 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-03 17:03:26,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 59 transitions, 272 flow [2023-08-03 17:03:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:03:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:03:26,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 560 transitions. [2023-08-03 17:03:26,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2023-08-03 17:03:26,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 560 transitions. [2023-08-03 17:03:26,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 560 transitions. [2023-08-03 17:03:26,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:03:26,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 560 transitions. [2023-08-03 17:03:26,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.0) internal successors, (560), 4 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:26,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:26,776 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:26,776 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 170 flow. Second operand 4 states and 560 transitions. [2023-08-03 17:03:26,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 59 transitions, 272 flow [2023-08-03 17:03:26,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 59 transitions, 267 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 17:03:26,777 INFO L231 Difference]: Finished difference. Result has 73 places, 52 transitions, 161 flow [2023-08-03 17:03:26,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=73, PETRI_TRANSITIONS=52} [2023-08-03 17:03:26,778 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 9 predicate places. [2023-08-03 17:03:26,778 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 52 transitions, 161 flow [2023-08-03 17:03:26,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:26,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:03:26,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:03:26,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 17:03:26,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:26,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:03:26,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:03:26,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1036912654, now seen corresponding path program 1 times [2023-08-03 17:03:26,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:03:26,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871044015] [2023-08-03 17:03:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:03:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:03:27,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:03:27,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871044015] [2023-08-03 17:03:27,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871044015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:03:27,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101775325] [2023-08-03 17:03:27,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:27,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:27,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:03:27,052 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:03:27,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 17:03:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:27,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 17:03:27,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:03:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:03:27,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 17:03:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:03:27,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101775325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 17:03:27,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 17:03:27,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 17:03:27,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162543141] [2023-08-03 17:03:27,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 17:03:27,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:03:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:03:27,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:03:27,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 17:03:27,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2023-08-03 17:03:27,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 52 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:27,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:03:27,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2023-08-03 17:03:27,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 17:03:45,443 INFO L124 PetriNetUnfolderBase]: 184240/236842 cut-off events. [2023-08-03 17:03:45,443 INFO L125 PetriNetUnfolderBase]: For 2635/2635 co-relation queries the response was YES. [2023-08-03 17:03:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469047 conditions, 236842 events. 184240/236842 cut-off events. For 2635/2635 co-relation queries the response was YES. Maximal size of possible extension queue 7531. Compared 1515059 event pairs, 118402 based on Foata normal form. 36/211093 useless extension candidates. Maximal degree in co-relation 166052. Up to 226684 conditions per place. [2023-08-03 17:03:46,712 INFO L140 encePairwiseOnDemand]: 271/275 looper letters, 56 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 17:03:46,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 319 flow [2023-08-03 17:03:46,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 17:03:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 17:03:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 572 transitions. [2023-08-03 17:03:46,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-08-03 17:03:46,714 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 572 transitions. [2023-08-03 17:03:46,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 572 transitions. [2023-08-03 17:03:46,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 17:03:46,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 572 transitions. [2023-08-03 17:03:46,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.0) internal successors, (572), 4 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:46,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:46,718 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 275.0) internal successors, (1375), 5 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:46,718 INFO L175 Difference]: Start difference. First operand has 73 places, 52 transitions, 161 flow. Second operand 4 states and 572 transitions. [2023-08-03 17:03:46,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 319 flow [2023-08-03 17:03:46,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 313 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 17:03:46,722 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 175 flow [2023-08-03 17:03:46,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=175, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-03 17:03:46,723 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 11 predicate places. [2023-08-03 17:03:46,723 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 175 flow [2023-08-03 17:03:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:46,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 17:03:46,724 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 17:03:46,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 17:03:46,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:46,928 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-03 17:03:46,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 17:03:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash -188862607, now seen corresponding path program 1 times [2023-08-03 17:03:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 17:03:46,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570299957] [2023-08-03 17:03:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 17:03:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:46,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:03:46,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 17:03:46,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570299957] [2023-08-03 17:03:46,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570299957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 17:03:46,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38538366] [2023-08-03 17:03:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 17:03:46,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 17:03:46,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 17:03:46,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 17:03:47,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 17:03:47,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 17:03:47,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 17:03:47,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 17:03:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 17:03:47,073 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 17:03:47,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38538366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 17:03:47,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 17:03:47,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 17:03:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281765210] [2023-08-03 17:03:47,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 17:03:47,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 17:03:47,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 17:03:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 17:03:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 17:03:47,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 275 [2023-08-03 17:03:47,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 175 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 17:03:47,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 17:03:47,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 275 [2023-08-03 17:03:47,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand